I ran into a similar "bug" a few days ago when working with .data() and .attr('data-name') for HTML5 data attributes. ... <看更多>

I find it very easy to think you could set the DOM data attribute with ... that the function to set does not work like the function to get. ... <看更多>

Data attributes let you assign additional data to DOM elements. You can then retrieve and use that data. In this ... ... <看更多>

You can set data- attributes to <option> (or <optgroup>) and use them inside ... If this example stops working, you have most likely reached the usage limit ... ... <看更多>